Results 21 to 30 of about 22,566 (251)

Mild and selective catalytic oxidation of organic substrates by a carbon nanotube-rhodium nanohybrid [PDF]

open access: yes, 2015
International audienceA heterogeneous catalyst was assembled by stabilization of rhodium nanoparticles on carbon nanotubes. The nanohybrid was used for the catalytic aerobic oxidation of diverse substrates such as hydroquinones, hydroxylamines, silanes ...
Donck, Simon   +8 more
core   +2 more sources

Influence du pH sur la rétention des révélateurs photographiques hydroquinones par nanofiltration [PDF]

open access: yes, 2011
L’objet de ce travail est d’étudier l’influence du pH sur le taux de rétention lors de la nanofiltration des solutions d’hydroquinone, d’hydroquinone monosulfonate et d’hydroquinone disulfonate seules ou en mélange, qui sont présents dans les bains ...
Baroudi, Moumen   +2 more
core   +1 more source

2-Amino-4-(4-methoxyphenyl)-1-(4-methylphenyl)-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carbonitrile

open access: yesIUCrData, 2018
In the title compound, C24H23N3O2, the cyclohexene and 1,4-dihydropyridine rings of the 1,4,5,6,7,8-hexahydroquinoline ring system each adopt a twisted-boat conformation. The dihedral angle between the benzene rings is 13.89 (10)°.
Asmaa H. A. Tamam   +5 more
doaj   +1 more source

Cytotoxic Terpene Quinones from Marine Sponges

open access: yesMarine Drugs, 2010
The 1,4-benzoquinone moiety is a common structural feature in a large number of compounds that have received considerable attention owing to their broad spectrum of biological activities.
Marina Gordaliza
doaj   +1 more source

Laccase-catalyzed derivatization of 6-aminopenicillanic, 7-aminocephalosporanic and 7-aminodesacetoxycephalosporanic acid

open access: yesAMB Express, 2020
Trametes spec. laccase (EC 1.10.3.2.) mediates the oxidative coupling of 6-aminopenicillanic, 7-aminocephalosporanic, and 7-aminodesacetoxycephalosporanic acid with 2,5-dihydroxybenzoic acid derivatives to form new penicillin and cephalosporin structures,
Annett Mikolasch   +3 more
doaj   +1 more source

Ground states of conjugated molecules - XIV: redox potentials of quinones [PDF]

open access: yes, 1969
The semiempirical SCF MO procedure of Part XIF of this series has been used to calculate relative redox potentials for a series of 25 quinones for which experimental data are available.
Dewar, M. J. S., Trinajstić, Nenad
core   +1 more source

Xishaeleganins A–D, Sesquiterpenoid Hydroquinones from Xisha Marine Sponge Dactylospongia elegans

open access: yesMarine Drugs, 2022
Four new sesquiterpene hydroquinones, xishaeleganins A–D (6–9), along with eleven known related ones (12 and 14–23) were isolated from the Xisha marine sponge Dactylospongia elegans (family Thorectida).
Bao Chen   +5 more
doaj   +1 more source

The MarR-Type Repressor MhqR Confers Quinone and Antimicrobial Resistance in Staphylococcus aureus [PDF]

open access: yes, 2019
Aims: Quinone compounds are electron carriers and have antimicrobial and toxic properties due to their mode of actions as electrophiles and oxidants.
Fritsch, Verena Nadin   +9 more
core   +1 more source

Quantitative aspects of the interfacial catalytic oxidation of Dithiothreitol by dissolved oxygen in the presence of carbon nanoparticles [PDF]

open access: yes, 2016
The catalytic nature of particulate matter is often advocated to explain its ability to generate reactive oxygen species, but quantitative data are lacking.
Rossi, Michel J., Sauvain, Jean-Jacques
core   +2 more sources

Synthesis and cytotoxic activity of geranylmethoxyhydroquinone derivatives [PDF]

open access: yes, 2012
Indexación: Web of Science; ScieloEl geranilo-2 ,4-sintético nuevo methoxyhydroquinone 1 y el conocido geranilo-4 ,5 methoxyhydroquinone- 2 se prepararon por sustitución electrófila aromática (EAS) reacciones entre geraniol y 1,3,5-trimethoxyphenol ...
Baeza Maturana, Evelyn   +5 more
core   +1 more source

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